//recur.cpp -- using recursion

#include<iostream>
void countdown(int n);
int main()
{
    countdown(4);
    return 0;
}

void countdown(int n)
{
    using namespace std;
    cout << "Countdown: " << n << endl;
    if(n>0)
        countdown(n - 1);
    cout << n << ": Kaboom!" << endl;
}

